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ORNL researchers quantify the effect of increasing highway speed on fuel economy

Green Car Congress

legal light-duty vehicles from 1984 to present. Data has been collected for 23 light-duty vehicles at ORNL’s vehicle research laboratory and a valuable data set for 51 vehicles was loaned to ORNL by Chrysler, LLC under a non-disclosure agreement. Analysis has focused on speeds of 50, 60, 70 and 80 mph. [ Footnotes. [ Thomas, H-L.

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Achates Power building 2.7L opposed-piston light-duty engine; exceeding CAFE 2025, Tier 3 targets at lower cost

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six-piston) light-duty version of its opposed piston engine (OPE) in both diesel- and gasoline-fueled versions. Achates will demonstrate the engine in 2018 in a driveable light-duty truck. The light-duty engine is a “basic” Achates opposed piston 2-stroke engine, said Redon—i.e., liter, 3-cylinder (i.e.,

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Achates OPGCI project targeting 50% fuel efficiency gains over downsized GDI engine at reduced cost

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liter opposed-piston, gasoline compression ignition engine applicable to large passenger vehicles, pick-up trucks, SUVs and minivans. At idle and low loads, rebreathing of hot exhaust gases provided stable compression ignition with very low engine-out NO x and PM emissions. displacements, said Redon. Earlier post.). Earlier post.).

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NRC report finds significant number of near-term technologies could greatly reduce fuel consumption in passenger cars

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To address this request, the NRC formed the Committee on the Assessment of Technologies for Improving Light-Duty Vehicle Fuel Economy. Spark-ignition (SI) engines will continue to be the primary source of propulsion for light-duty vehicles in the United States over the time frame of the report (next 15 years).

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